Wrecking crane



ay 927 J. H. STALEY WRECKING CRANE Filed July 20, 1925 ATTORNEY$ Patented May 24, 1927. I

UNITED STATES PATENT OFFICE.

JOSEPH H. STALEY, OF, COLUMBUS, INDIANA, ASSIGNOR' T NATIONAL STANDARD COMPANY, OF NILES, MICHIGAN.

WRECKING CRANE.

Application filed July 20,1925. Serial No. 44,838.

This invention relates to improvements in A holding pawl 13 coacting with the gear 8 wrecking cranes. r is provided anda screw 14 is provided to he main object of this invention is to prolock the pawl in engagement. vide an improved wrecking crane adapted to T he boom comprises apair of angle iron be mounted on a motor vehicle which is side members 15 which are mounted on the simple and economical in structure and one pivots 16 on the projecting ends of the frame in which the boom may be easily adjusted to members 2. The coupling bracket and spaemeet varying conditions. ing member 17 is" secured between the outer Objects pertaining to details and econenss oi the members 15 and has holes 18 10 omies of construction and operation of my therein for the attachment of the tackle. inventionwill definitely appear from the de- The tackle is designated generally by the tailed description to follow. numeral 19. I I accomplish the objects of my invention The supporting struts 20 are made up of by the devices and means described in the telescoping sections, each section having a 10 following specification. The invention is loop 21 at its inner end slidably embracing clearly defined and pointed out in the claim. the coacting section. The struts have holes A structure embodying the features of my 22 therein with which the bolts or pins 23 invention is clearly illustrated in the accommay be selectively engaged so that theelevapanying drawing forming a part ofthis aption of the boom may be varied within its 26 plication, in which: scope as indicated by dotted lines in Fig. II. .Flg. I is a perspective view of my 1m- To itCCOIIlPliSh'tlllS it is only necessary to proved wrecking crane. remove the bolts, the boom being supported Fig. II is a side elevation with the boom or elevated by the tackle chain, if desired, shown in one of its adjusted positions by andreinsert the bolts at the desired point. 2 full lines and in another position by dotted This adjustment can be quickly made and lines. with con'iparatively little effort.

Fig. III is a fragmentary plan View. Having thus described my invention, what Similar numerals of reference indicate I claim as newv and desire to secure by Letsiinilar parts in all of the Views. ters Patent is:

30 Referring to the drawing, I provide a The combination of a frame, a boom pivi'rame adapted to be mounted upon the bed otally mounted on said frame, a tackle carof a truck or the like and comprising base ried by said boom, a strut connecting said' pieces I. cross pieces 2 mounted on the base boom to said frame and comprising a pair pieces to project at one end as at 3, uprights of sections connected to the boom and frame, 4, top 5, and suitable braces 6. The winch each section having a slide loop embracing T is mounted upon this frame and has a gear the coacting section, one of the sections hav- 8 on its spindle, the driving pinion 9 being ing a series of holes therein, and a pin 30 mounted on the frame to mesh with the selectively engageable with said'holes'for gear 8. adjustably supporting the boom. 40 The-crank 10 is engageable with the stud In witness whereof I have hereunto set ll of the pinion or with the stud 12 of the my hand. gear 8 so that the drum may be rapidly turned when no particular power is required. JOSEPH H. STALEY. 

